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<body>

<h2><a name="_Toc368632611">NoSQL Database</a></h2>
<p class="MsoNormal">NoSQL databases store information as key-value pairs.<span style="mso-spacerun:yes">&nbsp;
</span>Keys consist of major and minor components the combination of which 
dictates how data is clustered in the database.<span style="mso-spacerun:yes">&nbsp;
</span>All keys with the same major key are stored close to each other for fast 
access across the major key set.<span style="mso-spacerun:yes">&nbsp; </span>The 
values assigned to these keys are byte arrays which can be assigned Apache Avro 
schemas if desired. </p>
<p class="MsoNormal">AVM's database layout follows the schema seen below. The 
most complicated part of the database involves the layout of slide images.<span style="mso-spacerun:yes">&nbsp;
</span>When slides are imported into the database, the image is first converted 
into a layered and tiled JPEG-in-TIFF image.<span style="mso-spacerun:yes">&nbsp;
</span>Each layer is a sub-sampled version of the original with samplings ratios 
following sequence {1/1, 1/4, 1/16...}.<span style="mso-spacerun:yes">&nbsp;
</span>Tiles are 256 by 256 pixels sub regions of each layer and are stored in 
the same format as they exist in the TIFF image.<span style="mso-spacerun:yes">&nbsp;
</span>Each tile in each layer is accessed with a unique key and can therefore 
be independently retrieved.<span style="mso-spacerun:yes">&nbsp; </span>The keys 
major components include the slide’s name and group while minor components 
include the layer (sub-sampled image index) and XY coordinates of the tile 
within the layer. Tile coordinates are indexed as {0,1,2} and not as multiples 
of the tiles size.<span style="mso-spacerun:yes">&nbsp; </span>Each layer is 
stored with a set of properties similar to TIFF tags, and each property is 
stored as a separate database entry.</p>


<p class="MsoNormal">
<table border="0" cellpadding="0" cellspacing="0" style="border-collapse:
 collapse;width:582pt" width="776">
	<colgroup>
		<col style="mso-width-source:userset;mso-width-alt:7862;width:161pt" width="215" />
		<col style="mso-width-source:userset;mso-width-alt:10093;width:207pt" width="276" />
		<col style="mso-width-source:userset;mso-width-alt:10422;width:214pt" width="285" />
	</colgroup>
	<tr height="21" style="height:15.75pt;mso-yfti-firstrow:yes;mso-yfti-irow:0">
		<td class="auto-style1" height="21" style="height: 15.75pt; width: 161pt" width="215">
		Major Key</td>
		<td class="auto-style2" style="width: 207pt" width="276">Minor Key</td>
		<td class="auto-style2" style="width: 214pt" width="285">Value</td>
	</tr>
	<tr height="21" style="height:15.75pt;mso-yfti-irow:1">
		<td class="auto-style3" height="21" style="height: 15.75pt; width: 161pt" width="215">
		<span style="mso-bidi-font-family:Symbol;mso-fareast-font-family:Symbol">
		·<font class="font6">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font><font class="font5">"user"</font></span></td>
		<td class="auto-style4" style="width: 207pt" width="276">&nbsp;</td>
		<td class="auto-style4" style="width: 214pt" width="285">&nbsp;</td>
	</tr>
	<tr height="21" style="height:15.75pt;mso-yfti-irow:2">
		<td class="auto-style5" height="21" style="height: 15.75pt; width: 161pt" width="215">
		<span style="mso-fareast-font-family:&quot;Courier New&quot;">o<font class="font6">&nbsp;&nbsp;&nbsp;
		</font><font class="font5">&lt;user name&gt;</font></span></td>
		<td class="auto-style6" style="width: 207pt" width="276">
		<span style="mso-bidi-font-family:
  Symbol;mso-fareast-font-family:Symbol">·<font class="font6">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font>
		<font class="font5">"password"</font></span></td>
		<td class="auto-style4" style="width: 214pt" width="285">Hashed salted 
		password</td>
	</tr>
	<tr height="21" style="height:15.75pt;mso-yfti-irow:3">
		<td class="auto-style7" height="21" style="height: 15.75pt; width: 161pt" width="215">
		&nbsp;</td>
		<td class="auto-style6" style="width: 207pt" width="276">
		<span style="mso-bidi-font-family:
  Symbol;mso-fareast-font-family:Symbol">·<font class="font6">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font>
		<font class="font5">"permissions"</font></span></td>
		<td class="auto-style4" style="width: 214pt" width="285">&nbsp;</td>
	</tr>
	<tr height="20" style="height:15.0pt;mso-yfti-irow:4">
		<td class="auto-style8" height="41" rowspan="2" style="height: 30.75pt; width: 161pt" width="215">
		&nbsp;</td>
		<td class="auto-style9" rowspan="2" style="width: 207pt" width="276">
		<span style="mso-fareast-font-family:&quot;Courier New&quot;">o<font class="font6">&nbsp;&nbsp;&nbsp;
		</font><font class="font5">"study"</font></span></td>
		<td class="auto-style10" style="width: 214pt" width="285">String with 
		value of</td>
	</tr>
	<tr height="21" style="height:15.75pt">
		<td class="auto-style4" height="21" style="height: 15.75pt; width: 214pt" width="285">
		&lt;study<span style="mso-spacerun:yes">&nbsp; </span>name&gt;, &lt;permissions&gt;, 
		&lt;study ID#&gt;;</td>
	</tr>
	<tr height="20" style="height:15.0pt;mso-yfti-irow:5">
		<td class="auto-style8" height="41" rowspan="2" style="height: 30.75pt; width: 161pt" width="215">
		&nbsp;</td>
		<td class="auto-style9" rowspan="2" style="width: 207pt" width="276">
		<span style="mso-fareast-font-family:&quot;Courier New&quot;">o<font class="font6">&nbsp;&nbsp;&nbsp;
		</font><font class="font5">"solution"</font></span></td>
		<td class="auto-style10" style="width: 214pt" width="285">String with 
		value of</td>
	</tr>
	<tr height="21" style="height:15.75pt">
		<td class="auto-style4" height="21" style="height: 15.75pt; width: 214pt" width="285">
		&lt;solution<span style="mso-spacerun:yes">&nbsp; </span>name&gt;, &lt;permissions&gt;, 
		&lt;soltution ID#&gt;;</td>
	</tr>
	<tr height="21" style="height:15.75pt;mso-yfti-irow:6">
		<td class="auto-style3" height="21" style="height: 15.75pt; width: 161pt" width="215">
		<span style="mso-bidi-font-family:Symbol;mso-fareast-font-family:Symbol">
		·<font class="font6">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font><font class="font5">"study"</font></span></td>
		<td class="auto-style4" style="width: 207pt" width="276">&nbsp;</td>
		<td class="auto-style4" style="width: 214pt" width="285">&nbsp;</td>
	</tr>
	<tr height="21" style="height:15.75pt;mso-yfti-irow:7">
		<td class="auto-style9" height="84" rowspan="4" style="height: 63.0pt; width: 161pt" width="215">
		<span style="mso-fareast-font-family:
  &quot;Courier New&quot;">o<font class="font6">&nbsp;&nbsp;&nbsp; </font><font class="font5">
		&lt;study ID#&gt;</font></span></td>
		<td class="auto-style6" style="width: 207pt" width="276">
		<span style="mso-bidi-font-family:
  Symbol;mso-fareast-font-family:Symbol">·<font class="font6">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font>
		<font class="font5">"annotations"</font></span></td>
		<td class="auto-style4" style="width: 214pt" width="285">&nbsp;</td>
	</tr>
	<tr height="21" style="height:15.75pt">
		<td class="auto-style11" height="21" style="height: 15.75pt; width: 207pt" width="276">
		<span style="mso-fareast-font-family:&quot;Courier New&quot;">o<font class="font6">&nbsp;&nbsp;&nbsp;
		</font><font class="font5">&lt;slide group&gt;</font></span></td>
		<td class="auto-style4" style="width: 214pt" width="285">&nbsp;</td>
	</tr>
	<tr height="21" style="height:15.75pt">
		<td class="auto-style12" height="21" style="height: 15.75pt; width: 207pt" width="276">
		<span style="mso-bidi-font-family:Wingdings;mso-fareast-font-family:Wingdings">
		§<font class="font6">&nbsp; </font><font class="font5">&lt;slide name&gt;</font></span></td>
		<td class="auto-style4" style="width: 214pt" width="285">slide hash</td>
	</tr>
	<tr height="21" style="height:15.75pt">
		<td class="auto-style13" height="21" style="height: 15.75pt; width: 207pt" width="276">
		<span style="mso-bidi-font-family:Symbol;mso-fareast-font-family:Symbol">
		·<font class="font6">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font><font class="font5">&lt;annotation 
		name&gt;</font></span></td>
		<td class="auto-style4" style="width: 214pt" width="285">Annotations in 
		XML</td>
	</tr>
	<tr height="21" style="height:15.75pt;mso-yfti-irow:11">
		<td class="auto-style7" height="21" style="height: 15.75pt; width: 161pt" width="215">
		&nbsp;</td>
		<td class="auto-style6" style="width: 207pt" width="276">
		<span style="mso-bidi-font-family:
  Symbol;mso-fareast-font-family:Symbol">·<font class="font6">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font>
		<font class="font5">"users"</font></span></td>
		<td class="auto-style4" style="width: 214pt" width="285">Comma separated 
		list of user names</td>
	</tr>
	<tr height="21" style="height:15.75pt;mso-yfti-irow:12">
		<td class="auto-style3" height="21" style="height: 15.75pt; width: 161pt" width="215">
		<span style="mso-bidi-font-family:Symbol;mso-fareast-font-family:Symbol">
		·<font class="font6">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font><font class="font5">"slide"</font></span></td>
		<td class="auto-style4" style="width: 207pt" width="276">&nbsp;</td>
		<td class="auto-style4" style="width: 214pt" width="285">&nbsp;</td>
	</tr>
	<tr height="21" style="height:15.75pt;mso-yfti-irow:13">
		<td class="auto-style5" height="21" style="height: 15.75pt; width: 161pt" width="215">
		<span style="mso-fareast-font-family:&quot;Courier New&quot;">o<font class="font6">&nbsp;&nbsp;&nbsp;
		</font><font class="font5">&lt;slide group&gt;</font></span></td>
		<td class="auto-style4" style="width: 207pt" width="276">&nbsp;</td>
		<td class="auto-style4" style="width: 214pt" width="285">&nbsp;</td>
	</tr>
	<tr height="21" style="height:15.75pt;mso-yfti-irow:14">
		<td class="auto-style14" height="126" rowspan="6" style="height: 94.5pt; width: 161pt" width="215">
		<span style="mso-bidi-font-family:
  Wingdings;mso-fareast-font-family:Wingdings">§<font class="font6">&nbsp; </font>
		<font class="font5">&lt;slide name&gt;</font></span></td>
		<td class="auto-style6" style="width: 207pt" width="276">
		<span style="mso-bidi-font-family:
  Symbol;mso-fareast-font-family:Symbol">·<font class="font6">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font>
		<font class="font5">&lt;layer index&gt;</font></span></td>
		<td class="auto-style4" style="width: 214pt" width="285">&nbsp;</td>
	</tr>
	<tr height="21" style="height:15.75pt">
		<td class="auto-style11" height="21" style="height: 15.75pt; width: 207pt" width="276">
		<span style="mso-fareast-font-family:&quot;Courier New&quot;">o<font class="font6">&nbsp;&nbsp;&nbsp;
		</font><font class="font5">"properties"</font></span></td>
		<td class="auto-style4" style="width: 214pt" width="285">&nbsp;</td>
	</tr>
	<tr height="21" style="height:15.75pt">
		<td class="auto-style12" height="21" style="height: 15.75pt; width: 207pt" width="276">
		<span style="mso-bidi-font-family:Wingdings;mso-fareast-font-family:Wingdings">
		§<font class="font6">&nbsp; </font><font class="font5">...various tiff tags</font></span></td>
		<td class="auto-style4" style="width: 214pt" width="285">Tiff tag values</td>
	</tr>
	<tr height="21" style="height:15.75pt">
		<td class="auto-style11" height="21" style="height: 15.75pt; width: 207pt" width="276">
		<span style="mso-fareast-font-family:&quot;Courier New&quot;">o<font class="font6">&nbsp;&nbsp;&nbsp;
		</font><font class="font5">"tiles"</font></span></td>
		<td class="auto-style4" style="width: 214pt" width="285">&nbsp;</td>
	</tr>
	<tr height="21" style="height:15.75pt">
		<td class="auto-style12" height="21" style="height: 15.75pt; width: 207pt" width="276">
		<span style="mso-bidi-font-family:Wingdings;mso-fareast-font-family:Wingdings">
		§<font class="font6">&nbsp; </font><font class="font5">&lt;tile X index&gt;</font></span></td>
		<td class="auto-style4" style="width: 214pt" width="285">&nbsp;</td>
	</tr>
	<tr height="21" style="height:15.75pt">
		<td class="auto-style13" height="21" style="height: 15.75pt; width: 207pt" width="276">
		<span style="mso-bidi-font-family:Symbol;mso-fareast-font-family:Symbol">
		·<font class="font6">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font><font class="font5">&lt;tile Y index&gt;</font></span></td>
		<td class="auto-style4" style="width: 214pt" width="285">JPG image tile</td>
	</tr>
	<tr height="21" style="height:15.75pt;mso-yfti-irow:20">
		<td class="auto-style3" height="21" style="height: 15.75pt; width: 161pt" width="215">
		<span style="mso-bidi-font-family:Symbol;mso-fareast-font-family:Symbol">
		·<font class="font6">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font><font class="font5">"solution"</font></span></td>
		<td class="auto-style4" style="width: 207pt" width="276">&nbsp;</td>
		<td class="auto-style4" style="width: 214pt" width="285">&nbsp;</td>
	</tr>
	<tr height="21" style="height:15.75pt;mso-yfti-irow:21">
		<td class="auto-style5" height="21" style="height: 15.75pt; width: 161pt" width="215">
		<span style="mso-fareast-font-family:&quot;Courier New&quot;">o<font class="font6">&nbsp;&nbsp;&nbsp;
		</font><font class="font5">&lt;solution ID#&gt;</font></span></td>
		<td class="auto-style4" style="width: 207pt" width="276">&nbsp;</td>
		<td class="auto-style4" style="width: 214pt" width="285">Solution in XML</td>
	</tr>
	<tr height="21" style="height:15.75pt;mso-yfti-irow:22;mso-yfti-lastrow:yes">
		<td class="auto-style7" height="21" style="height: 15.75pt; width: 161pt" width="215">
		&nbsp;</td>
		<td class="auto-style6" style="width: 207pt" width="276">
		<span style="mso-bidi-font-family:
  Symbol;mso-fareast-font-family:Symbol">·<font class="font6">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font>
		<font class="font5">"users"</font></span></td>
		<td class="auto-style4" style="width: 214pt" width="285">Comma separated 
		list of user names</td>
	</tr>
</table>
</p>


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